BirdAnalyst
Species · BCR 9 · BBS 2025 Release · 1966–2024

Snowy Egret In Great Basin

All regionsGreat BasinWetland birds

Snowy Egret in Great Basin has risen sharply: up 59% on the route-weighted index since 1970.

+59%Since 1970TrendPercent change in the route-weighted abundance index between a smoothed baseline window and the most recent one. It tracks direction, not absolute population.Full methodology →
34Routes In RegionSurvey routesHow many standard-protocol BBS routes contributed counts. More routes means a steadier, better-sampled index; very thin coverage is suppressed.Full methodology →
55YearsYears surveyedNumber of years with at least one standard-protocol run in this geography. A longer record makes the trend more reliable.Full methodology →

Notable SignalsNotable signalsLong-arc shifts the engine flags automatically — sustained declines or increases large enough to stand out from year-to-year noise.Full methodology →

long arc increasecomputed indexTrend sourceWhether the figure is our own computed route-weighted index or an official USGS modeled estimate. The current build labels every trend as computed.Full methodology →

Snowy Egret has risen sharply in Great Basin: up 59% on the route-weighted index since 1970.

Snowy Egret In Great Basin Population Forecast

If the recent trend holds, Snowy Egret in Great Basin is projected to stay roughly flat through 2028, near 0.28 (95% range 0.00–0.75). A 5-year backtest shows a typical error of ±227%, with 100% of held-out values landing inside the 95% band.

-7%Change by 2028TrendPercent change in the route-weighted abundance index between a smoothed baseline window and the most recent one. It tracks direction, not absolute population.Full methodology →
0.28Projected 2028 indexProjected indexThe central forecast of the abundance index if the recent trend continues. A projection of the current trajectory, not a prediction.Full methodology →
0.00–0.7595% range95% rangeThe 95% uncertainty band around the projection at the forecast horizon. The true value should land inside it most of the time.Full methodology →
±227%Backtest errorBacktest errorTypical error when we hold out the most recent years, forecast them, and compare to what actually happened. Lower means a more trustworthy projection.Full methodology →
If the recent trend holds, Snowy Egret in Great Basin is projected to stay roughly flat through 2028, near 0.28 (95% range 0.00–0.75). A 5-year backtest shows a typical error of ±227%, with 100% of held-out values landing inside the 95% band.19682028
Projection of the recent trend (dashed) with 80/95% bands — a projection, not a prediction. Habitat, climate, and land use are not modeled.
YearProjected indexProjected indexThe central forecast of the abundance index if the recent trend continues. A projection of the current trajectory, not a prediction.Full methodology →95% low95% rangeThe 95% uncertainty band around the projection at the forecast horizon. The true value should land inside it most of the time.Full methodology →95% high95% rangeThe 95% uncertainty band around the projection at the forecast horizon. The true value should land inside it most of the time.Full methodology →
20240.280.000.75
20250.280.000.75
20260.280.000.75
20270.280.000.75
20280.280.000.75

Routes In Great Basin

Routes recording Snowy Egret in Great Basin.
Recent countThe raw number of individuals recorded on this route in its most recent survey year. A single-route tally, not a trend.Full methodology →
Bear RiverUTAH402023
DeltaUTAH182005
DorrisCALIFORNIA132019
Ruby ValleyNEVADA51999
FallonNEVADA52018
Carson RiverNEVADA52005
PrincetonOREGON51979
Ruby Valley 2NEVADA32019
Fish LakeOREGON31994
Malheur NwrOREGON31989
Crowley LakeCALIFORNIA22019
Clear Lk ResCALIFORNIA21984
HenryIDAHO21979
Blackft ResIDAHO22001
GardnervilleNEVADA22004
WillisNEVADA22007
Oak CityUTAH22004
Stock ResUTAH21995
NubieberCALIFORNIA11989
Honey LakeCALIFORNIA12022
SpringfieldIDAHO11997
Mud LakeIDAHO11994
PrestonIDAHO12007
MidasNEVADA11992
Toiyabe NfNEVADA12002

Source: USGS North American Breeding Bird Survey, retrieved 2026-05-22.